The pSeries technical specialist has a number of tasks to perform and does not have time to do them all. It is a week before the end of quarter and the account executives all state that their individual requests are the highest priority. How should the following task list be prioritized？ （） 1. Return a call from customer seeking compatibility information. 2. Configure three p690 servers to be ordered in two weeks. 3. Prepare a POWER5 presentation to give to a customer in two weeks. 4. Configure three p690 servers to be ordered this quarter.

A. 4，2，1，3
B. 4，3，1，2
C. 2，4，3，1
D. 2，3，4，1